Razor-blade sharpener.



F. I;. BONHAM.

RAZOR BLADE SHARFENER. APPucATmN FILED NOV-3.1916.

1,262,008. Patented Apr. 9,191&

2 SHEETS-SHEET I.

TN E55 E6 Bun/fl Ban/aim IWEYITOW to I w 44 F. E. SUNHAM.

RAZOR BLADE SHARPENER. APPLICATION FILED NOV. 3. 1916.

2 SHEETS-SH5ET 2- atented Apr. 9, 1918.

FRANK BONHAM, OF ST. PAUL, MINNESOTA.

BAZOBr-BLADE SHARPENER.

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed no emima, 1916. Serial No. 129,285.

To all wdom it may concern:

Be it known that I, FRANK. E. BONHAM, a

citizen of the United States, residing at St.

Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Razor Blade ShEII'JEIIBI'S, of which the following is a speci cation.

My invention relates to improvement in up aratus for sharpening the blades of satety razors, its object being to provide improved mea ns for performing a continuous sharpenin operation along the edge of the 'razor bla e, 1nd particularly to impart the tooth-like edge to the blade corresponding to the edge imparted in the ordinary stroppin operation of an ordinary razor blade.

1%) this end the invention consists in the features of construction, combination, and arrangement of parts hereinafter described and claimed.

In the accompanying drawings forming part of this specification, Figure 1 is an elevation of the sharpenin members of my apparatus, and supporting frame work thereof.

Fig. 2 is a detail View of one of the sharpening strops.

Fig. 3 is a detail viewof filling strip.

Fi 4 is a detail of the adjusting collar for the filling strip and strap.

Fig. 5 is a detail of an opposed collar, and Fig. 6 is a longitudinal, vertical section throu h themachine as shown in Fig. 1.

Re erring to the drawings A represents a suitable frame-work in which a pair of rollers 23, 4 have journal support,

In carrying out my invention I arrange around the roller 3 an endless coil of leather 5, which constitutes one of the strops and around the, roller 4 a similar intermeshing leather strop coil 6. An endless filling strip .7, preferably springy, as steel, is wound around each roller to fill the space between the coils of the strops 5 and 6 and hold the coils in uniformly spaced position. Collars 8 and 9 are secured upon the ends of the rollers in abutting position against the corresponding end of the filling strips 7 and are adjustable upon the rollers to exert iressure against said filling strips t o hOlf the strops 5 and 6 in tightened position against the rollers. The collars are adapted to hold in suitable position the rollers, as by loch screws 10.

a cotiperating The rollers are adapted to be operated by a suitable source of power through the medium of the intermeshing gears 11 connected with the source of power through the polls 12 and belt 13.

Suitab e means may be employed to hold the razor blade in bearing position for stroppin against the coil strops 5 and 6. The holc ing means for the razor blade may be any desired construction as employed in apparatus of this general type and, forming no part of the present invention, is not shown and described.

Foif the purposes of this application my invention resides in the spiral strops 5 and 6 preferably of leather wound around the rollers, together with the filling strips 7 and the adjustable collars 8 for holding the leather strops between the filling strips. The fill ng strips and strops are both preferably continuous and as shown the strop upon one roller fits within the spaces formed by the spirals of the strop upon the other roller.

By means of the endless strops 5 and 6 in the spiral coil form shown, a continuous stropping along the edge of the razor blade is secured which imparts a tooth-like effect similar to the effect produced on the edge of an ordinary razor blade by the proper use of a strop. Q

By adjusting the collars 8 and 9 inwardly upon the rollers a squeezing pressure is exerted against the adjacent ends of the filling strips to tightly clan'lp the spiral strep. It will be understood that the spiral strop is lo se around the rollers as is the filling strip, being held in position by the clamping collars 8 and 9. On account of the loose positioning of the filling strips and spiral strops clamped within the collars I am enabled to position the leather strop on ed e, which gives a much better stropping ed ge to the razor blade than is given in a construction where the spiral leather coil Without intermediate filling strips is permanently positioned around the rollers.

I c aim:

1. In an n ilparatus of the olassdescribed,

the combination of a pair of rollers, endless stropping coils loosely arranged spirally around said rollers, one coil iitting between the spirals of the coil of the other roller fillings loosely fitted between the spirals 0% said coils, and means For lmlding said coils clamped between said fillings.

2. In an apparatus of the class described, the combination of a pair of rollers, endless inter-meshing spiral leather StlOlJS coiled around said rollers, s irnl filling strips coiled around said r0 love between said strops. and means for applying pressure to the adjacent ends of the strapping and filling coils upon each roller for the purpose of squeezing them together and holding them clamped upon the roller.

In testimony whereof I afi'lx my signature in presence of two witnesses.

V FRANK E. BONHAM. Witnesses l H. SwANsoN, BEATRICE BROWN. 

